Montupet or Nemak LS1 block

Strobes

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I saw that GM installed some LS6 blocks in some 01 and 02 F-bodies.

Block id 12561168 is the stronger of the two.

Does anyone know of a good way to see the block id number?

It is on the back of the block driver side just above the transmission flange but I have never been able to see it.

I have a 2001 WS6.
 
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